Data Security | CS PPT +Worksheets +Activity + Mcq Quiz + Answers_Marking Scheme - Complete Lesson Pack for Cambridge IGCSE, AS & A-Level Computer Science

01 Lecture PPT

Security/Integrity/Privacy → Malware types → Hacking/Phishing/Social Engineering → SQL Injection/DDoS/MitM (with worked examples) → Firewalls & IDS → Access Control & MFA → Symmetric & Asymmetric Encryption → Hashing & Digital Signatures → SSL/TLS, VPNs & Backups → Full comparison table → Practice Qs → Summary

02 Worksheet

14 questions across 4 sections — definitions, scenario analysis, phishing/SQL injection/DDoS descriptions, encryption comparison, hashing properties, digital signature process, backup strategy, extended evaluation

03 Activity

Threat Card Sort (classify 9 threats) → GreenLeaf Security Audit (find 9 vulnerabilities in a scenario) → Encryption Simulation (Caesar cipher + hash observations + asymmetric role play) → News Story Debate + two real breach case studies

MCQ Quiz

20 questions + Answer Key — covers all topics from integrity/privacy definitions to DDoS, SQL injection, symmetric/asymmetric, hashing, salting, digital signatures, and backups

Answers & Marking Scheme

Full model answers, mark bands for extended questions, MCQ answer key with explanations, mark allocation summary — not for student distribution